Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik...
[linux-2.6] / drivers / media / radio / radio-trust.c
1 /* radio-trust.c - Trust FM Radio card driver for Linux 2.2
2  * by Eric Lammerts <eric@scintilla.utwente.nl>
3  *
4  * Based on radio-aztech.c. Original notes:
5  *
6  * Adapted to support the Video for Linux API by
7  * Russell Kroll <rkroll@exploits.org>.  Based on original tuner code by:
8  *
9  * Quay Ly
10  * Donald Song
11  * Jason Lewis      (jlewis@twilight.vtc.vsc.edu)
12  * Scott McGrath    (smcgrath@twilight.vtc.vsc.edu)
13  * William McGrath  (wmcgrath@twilight.vtc.vsc.edu)
14  *
15  * The basis for this code may be found at http://bigbang.vtc.vsc.edu/fmradio/
16  */
17
18 #include <stdarg.h>
19 #include <linux/module.h>
20 #include <linux/init.h>
21 #include <linux/ioport.h>
22 #include <asm/io.h>
23 #include <asm/uaccess.h>
24 #include <linux/videodev.h>
25 #include <media/v4l2-common.h>
26 #include <linux/config.h>       /* CONFIG_RADIO_TRUST_PORT      */
27
28 /* acceptable ports: 0x350 (JP3 shorted), 0x358 (JP3 open) */
29
30 #ifndef CONFIG_RADIO_TRUST_PORT
31 #define CONFIG_RADIO_TRUST_PORT -1
32 #endif
33
34 static int io = CONFIG_RADIO_TRUST_PORT;
35 static int radio_nr = -1;
36 static int ioval = 0xf;
37 static __u16 curvol;
38 static __u16 curbass;
39 static __u16 curtreble;
40 static unsigned long curfreq;
41 static int curstereo;
42 static int curmute;
43
44 /* i2c addresses */
45 #define TDA7318_ADDR 0x88
46 #define TSA6060T_ADDR 0xc4
47
48 #define TR_DELAY do { inb(io); inb(io); inb(io); } while(0)
49 #define TR_SET_SCL outb(ioval |= 2, io)
50 #define TR_CLR_SCL outb(ioval &= 0xfd, io)
51 #define TR_SET_SDA outb(ioval |= 1, io)
52 #define TR_CLR_SDA outb(ioval &= 0xfe, io)
53
54 static void write_i2c(int n, ...)
55 {
56         unsigned char val, mask;
57         va_list args;
58
59         va_start(args, n);
60
61         /* start condition */
62         TR_SET_SDA;
63         TR_SET_SCL;
64         TR_DELAY;
65         TR_CLR_SDA;
66         TR_CLR_SCL;
67         TR_DELAY;
68
69         for(; n; n--) {
70                 val = va_arg(args, unsigned);
71                 for(mask = 0x80; mask; mask >>= 1) {
72                         if(val & mask)
73                                 TR_SET_SDA;
74                         else
75                                 TR_CLR_SDA;
76                         TR_SET_SCL;
77                         TR_DELAY;
78                         TR_CLR_SCL;
79                         TR_DELAY;
80                 }
81                 /* acknowledge bit */
82                 TR_SET_SDA;
83                 TR_SET_SCL;
84                 TR_DELAY;
85                 TR_CLR_SCL;
86                 TR_DELAY;
87         }
88
89         /* stop condition */
90         TR_CLR_SDA;
91         TR_DELAY;
92         TR_SET_SCL;
93         TR_DELAY;
94         TR_SET_SDA;
95         TR_DELAY;
96
97         va_end(args);
98 }
99
100 static void tr_setvol(__u16 vol)
101 {
102         curvol = vol / 2048;
103         write_i2c(2, TDA7318_ADDR, curvol ^ 0x1f);
104 }
105
106 static int basstreble2chip[15] = {
107         0, 1, 2, 3, 4, 5, 6, 7, 14, 13, 12, 11, 10, 9, 8
108 };
109
110 static void tr_setbass(__u16 bass)
111 {
112         curbass = bass / 4370;
113         write_i2c(2, TDA7318_ADDR, 0x60 | basstreble2chip[curbass]);
114 }
115
116 static void tr_settreble(__u16 treble)
117 {
118         curtreble = treble / 4370;
119         write_i2c(2, TDA7318_ADDR, 0x70 | basstreble2chip[curtreble]);
120 }
121
122 static void tr_setstereo(int stereo)
123 {
124         curstereo = !!stereo;
125         ioval = (ioval & 0xfb) | (!curstereo << 2);
126         outb(ioval, io);
127 }
128
129 static void tr_setmute(int mute)
130 {
131         curmute = !!mute;
132         ioval = (ioval & 0xf7) | (curmute << 3);
133         outb(ioval, io);
134 }
135
136 static int tr_getsigstr(void)
137 {
138         int i, v;
139
140         for(i = 0, v = 0; i < 100; i++) v |= inb(io);
141         return (v & 1)? 0 : 0xffff;
142 }
143
144 static int tr_getstereo(void)
145 {
146         /* don't know how to determine it, just return the setting */
147         return curstereo;
148 }
149
150 static void tr_setfreq(unsigned long f)
151 {
152         f /= 160;       /* Convert to 10 kHz units      */
153         f += 1070;      /* Add 10.7 MHz IF                      */
154
155         write_i2c(5, TSA6060T_ADDR, (f << 1) | 1, f >> 7, 0x60 | ((f >> 15) & 1), 0);
156 }
157
158 static int tr_do_ioctl(struct inode *inode, struct file *file,
159                        unsigned int cmd, void *arg)
160 {
161         switch(cmd)
162         {
163                 case VIDIOCGCAP:
164                 {
165                         struct video_capability *v = arg;
166
167                         memset(v,0,sizeof(*v));
168                         v->type=VID_TYPE_TUNER;
169                         v->channels=1;
170                         v->audios=1;
171                         strcpy(v->name, "Trust FM Radio");
172
173                         return 0;
174                 }
175                 case VIDIOCGTUNER:
176                 {
177                         struct video_tuner *v = arg;
178
179                         if(v->tuner)    /* Only 1 tuner */
180                                 return -EINVAL;
181
182                         v->rangelow = 87500 * 16;
183                         v->rangehigh = 108000 * 16;
184                         v->flags = VIDEO_TUNER_LOW;
185                         v->mode = VIDEO_MODE_AUTO;
186
187                         v->signal = tr_getsigstr();
188                         if(tr_getstereo())
189                                 v->flags |= VIDEO_TUNER_STEREO_ON;
190
191                         strcpy(v->name, "FM");
192
193                         return 0;
194                 }
195                 case VIDIOCSTUNER:
196                 {
197                         struct video_tuner *v = arg;
198                         if(v->tuner != 0)
199                                 return -EINVAL;
200                         return 0;
201                 }
202                 case VIDIOCGFREQ:
203                 {
204                         unsigned long *freq = arg;
205                         *freq = curfreq;
206                         return 0;
207                 }
208                 case VIDIOCSFREQ:
209                 {
210                         unsigned long *freq = arg;
211                         tr_setfreq(*freq);
212                         return 0;
213                 }
214                 case VIDIOCGAUDIO:
215                 {
216                         struct video_audio *v = arg;
217
218                         memset(v,0, sizeof(*v));
219                         v->flags = VIDEO_AUDIO_MUTABLE | VIDEO_AUDIO_VOLUME |
220                                   VIDEO_AUDIO_BASS | VIDEO_AUDIO_TREBLE;
221                         v->mode = curstereo? VIDEO_SOUND_STEREO : VIDEO_SOUND_MONO;
222                         v->volume = curvol * 2048;
223                         v->step = 2048;
224                         v->bass = curbass * 4370;
225                         v->treble = curtreble * 4370;
226
227                         strcpy(v->name, "Trust FM Radio");
228                         return 0;
229                 }
230                 case VIDIOCSAUDIO:
231                 {
232                         struct video_audio *v = arg;
233
234                         if(v->audio)
235                                 return -EINVAL;
236                         tr_setvol(v->volume);
237                         tr_setbass(v->bass);
238                         tr_settreble(v->treble);
239                         tr_setstereo(v->mode & VIDEO_SOUND_STEREO);
240                         tr_setmute(v->flags & VIDEO_AUDIO_MUTE);
241                         return 0;
242                 }
243                 default:
244                         return -ENOIOCTLCMD;
245         }
246 }
247
248 static int tr_ioctl(struct inode *inode, struct file *file,
249                     unsigned int cmd, unsigned long arg)
250 {
251         return video_usercopy(inode, file, cmd, arg, tr_do_ioctl);
252 }
253
254 static struct file_operations trust_fops = {
255         .owner          = THIS_MODULE,
256         .open           = video_exclusive_open,
257         .release        = video_exclusive_release,
258         .ioctl          = tr_ioctl,
259         .compat_ioctl   = v4l_compat_ioctl32,
260         .llseek         = no_llseek,
261 };
262
263 static struct video_device trust_radio=
264 {
265         .owner          = THIS_MODULE,
266         .name           = "Trust FM Radio",
267         .type           = VID_TYPE_TUNER,
268         .hardware       = VID_HARDWARE_TRUST,
269         .fops           = &trust_fops,
270 };
271
272 static int __init trust_init(void)
273 {
274         if(io == -1) {
275                 printk(KERN_ERR "You must set an I/O address with io=0x???\n");
276                 return -EINVAL;
277         }
278         if(!request_region(io, 2, "Trust FM Radio")) {
279                 printk(KERN_ERR "trust: port 0x%x already in use\n", io);
280                 return -EBUSY;
281         }
282         if(video_register_device(&trust_radio, VFL_TYPE_RADIO, radio_nr)==-1)
283         {
284                 release_region(io, 2);
285                 return -EINVAL;
286         }
287
288         printk(KERN_INFO "Trust FM Radio card driver v1.0.\n");
289
290         write_i2c(2, TDA7318_ADDR, 0x80);       /* speaker att. LF = 0 dB */
291         write_i2c(2, TDA7318_ADDR, 0xa0);       /* speaker att. RF = 0 dB */
292         write_i2c(2, TDA7318_ADDR, 0xc0);       /* speaker att. LR = 0 dB */
293         write_i2c(2, TDA7318_ADDR, 0xe0);       /* speaker att. RR = 0 dB */
294         write_i2c(2, TDA7318_ADDR, 0x40);       /* stereo 1 input, gain = 18.75 dB */
295
296         tr_setvol(0x8000);
297         tr_setbass(0x8000);
298         tr_settreble(0x8000);
299         tr_setstereo(1);
300
301         /* mute card - prevents noisy bootups */
302         tr_setmute(1);
303
304         return 0;
305 }
306
307 MODULE_AUTHOR("Eric Lammerts, Russell Kroll, Quay Lu, Donald Song, Jason Lewis, Scott McGrath, William McGrath");
308 MODULE_DESCRIPTION("A driver for the Trust FM Radio card.");
309 MODULE_LICENSE("GPL");
310
311 module_param(io, int, 0);
312 MODULE_PARM_DESC(io, "I/O address of the Trust FM Radio card (0x350 or 0x358)");
313 module_param(radio_nr, int, 0);
314
315 static void __exit cleanup_trust_module(void)
316 {
317         video_unregister_device(&trust_radio);
318         release_region(io, 2);
319 }
320
321 module_init(trust_init);
322 module_exit(cleanup_trust_module);